https://arstechnica.com/tech-policy/2020/12/youtube-bans-videos-claiming-trump-won/

For the last month, President Donald Trump and his allies have tried to cast doubt on President-elect Joe Biden's victory in the presidential election. However, they've failed to produce evidence of irregularities in Pennsylvania, Michigan, Georgia, or other states sufficient to overcome Biden's substantial lead in the electoral college. Now YouTube says it has had enough.

"We will start removing any piece of content uploaded today (or anytime after) that misleads people by alleging that widespread fraud or errors changed the outcome of the 2020 US Presidential election," the Google-owned service announced.